About: http://webisa.webdatacommons.org/368141491

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	hydrogen to form compounds, such as ammonia, which can be removed using conventional procedures, is adversely affected by the presence of such refractory nitrogen-containing compounds.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com